<?php
/**
 * User: xialei
 * Date: 2016/7/2 0002
 * Time: 15:01
 */

namespace app\models;


use yii\web\IdentityInterface;

class Admin implements IdentityInterface
{
    private $id;
    private static $users = [
        [
            'id' => 1,
            'username' => 'admin',
            'password' => 'admin'
        ]
    ];

    /**
     * Admin constructor.
     * @param $id
     */
    public function __construct($id)
    {
        $this->id = $id;
    }


    /**
     * Finds an identity by the given ID.
     * @param string|integer $id the ID to be looked for
     * @return IdentityInterface the identity object that matches the given ID.
     * Null should be returned if such an identity cannot be found
     * or the identity is not in an active state (disabled, deleted, etc.)
     */
    public static function findIdentity($id)
    {
        foreach (static::$users as $user) {
            if ($id == $user['id']) {
                return new static($id);
            }
        }
        return null;
    }

    /**
     * Finds an identity by the given token.
     * @param mixed $token the token to be looked for
     * @param mixed $type the type of the token. The value of this parameter depends on the implementation.
     * For example, [[\yii\filters\auth\HttpBearerAuth]] will set this parameter to be `yii\filters\auth\HttpBearerAuth`.
     * @return IdentityInterface the identity object that matches the given token.
     * Null should be returned if such an identity cannot be found
     * or the identity is not in an active state (disabled, deleted, etc.)
     */
    public static function findIdentityByAccessToken($token, $type = null)
    {
        return null;
    }

    /**
     * Returns an ID that can uniquely identify a user identity.
     * @return string|integer an ID that uniquely identifies a user identity.
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Returns a key that can be used to check the validity of a given identity ID.
     *
     * The key should be unique for each individual user, and should be persistent
     * so that it can be used to check the validity of the user identity.
     *
     * The space of such keys should be big enough to defeat potential identity attacks.
     *
     * This is required if [[User::enableAutoLogin]] is enabled.
     * @return string a key that is used to check the validity of a given identity ID.
     * @see validateAuthKey()
     */
    public function getAuthKey()
    {
        return md5($this->id);
    }

    /**
     * Validates the given auth key.
     *
     * This is required if [[User::enableAutoLogin]] is enabled.
     * @param string $authKey the given auth key
     * @return boolean whether the given auth key is valid.
     * @see getAuthKey()
     */
    public function validateAuthKey($authKey)
    {
        return md5($this->id) == $authKey;
    }

    public static function findIdentityByAccount($username, $password)
    {
        foreach (static::$users as $user) {
            if($user['username'] == $username && $user['password'] == $password){
                return new static($user['id']);
            }
        }
        return null;
    }
}